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Finding the Fourth Proportional to 329.90, 491.33 and 326.12

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Solution

The fourth proportional to 329.90, 491.33 and 326.12 is: 485.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.90 : 491.33 = 326.12 : x
  2. Step 2: Convert to fraction form
    329.90/491.33 = 326.12/x
  3. Step 3: Cross multiply
    329.90x = 491.33 × 326.12
  4. Step 4: Simplify right side
    329.90x = 160,232.54
  5. Step 5: Solve for x
    x = 160,232.54/329.90
  6. Step 6: Final answer
    x = 485.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.